Development of complete heart block in an adult patient with Sjögren's syndrome and anti-Ro/SS-A autoantibodies.

We describe the occurrence of complete heart block in a patient with Sjögren's syndrome. The patient's serum contained antibodies to both the 60-kd and 52-kd Ro proteins. This case indicates that although the adult atrioventricular node may be relatively resistant to the development of anti-Ro-associated heart block, it can nevertheless be affected.